Malicious PDF — malware analysis report

Static analysis result for SHA-256 597fab43ea966670…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 20:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 89c9539af91a49a2296992ceca4606db SHA-1: 1be61e7897c9efffcaf3d82db08c3f3d9392ab07 SHA-256: 597fab43ea966670817ead92520896042958aa69cbabda0e421c8f01987feaad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains keywords that appear to be search terms, further supporting the lure pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wix?keyword=autocratic+leader+examples+in+sport PDF link annotation
    • http://waragofekoxexaz.sportsontheweb.net/miconia_albicans_canela_de_velho.pdfIn PDF document text
    • http://winfreeiphone.xyz/198135759753fi87.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/xevemufixovunaso.pdfIn PDF document text
    • http://santecmb-sarl.com/morujodisujijilalizpfvj0.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/cause_and_effect_worksheets_for_2nd_grade.pdfIn PDF document text
    • http://5coupons.info/how_to_connect_plantronics_cs540_to_laptop0rbnq.pdfIn PDF document text
    • http://habirovradik.ru/ronuzevazijusapubodimisgk45.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/EshduaL/birikojabigipusiboxenaxir.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/hjipgcd/spaceflight_simulator_1._5_full_version_apk.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/gojitugotobakofo.pdfIn PDF document text
    • https://cdn.sqhk.co/muwesisokim/ghjixjb/aarp_crossword_daily_american.pdfIn PDF document text
    • http://fastdonwload.space/fall_guys_ultimate_knockout_gameplay_trailer8j0yu.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/ghPghjd/15842745823.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/aurora_rising_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/what_do_icons_mean_on_iphone_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaa30a7-11b7-4a13-a814-88889ddc6ae9/sat_test_practice_khan_academy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1064e4f7-4931-461b-80de-21330293f6ef/what_is_a_chemical_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d06f7d-963b-42d2-83b6-0b6820c10584/arbonne_host_rewards_uk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 5276 bytes
SHA-256: 7243ff22d68307f8aed2c82a1f24a299f469f448706f50e2105aae6e30e4a462
font_01_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 10700 bytes
SHA-256: 60deec44cf324e386ff6da43e3d5db967e690b53798ba5729f08e03294a11bc4

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